USB: ehci-platform: support EHCIs with transaction translator
Some EHCI controllers have a Transaction Translator built into the root hub. Support this feature in device tree when using the ehci-platform driver by adding a feature flag for it. This is needed to get USB working on NXP LPC18xx/43xx platforms. Signed-off-by: Joachim Eastwood <manabian@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -13,6 +13,8 @@ Optional properties:
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- big-endian-desc : boolean, set this for hcds with big-endian descriptors
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- big-endian : boolean, for hcds with big-endian-regs + big-endian-desc
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- needs-reset-on-resume : boolean, set this to force EHCI reset after resume
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- has-transaction-translator : boolean, set this if EHCI have a Transaction
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Translator built into the root hub.
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- clocks : a list of phandle + clock specifier pairs
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- phys : phandle + phy specifier pair
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- phy-names : "usb"
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@ -202,6 +202,10 @@ static int ehci_platform_probe(struct platform_device *dev)
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"needs-reset-on-resume"))
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pdata->reset_on_resume = 1;
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if (of_property_read_bool(dev->dev.of_node,
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"has-transaction-translator"))
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pdata->has_tt = 1;
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priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
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"phys", "#phy-cells");
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priv->num_phys = priv->num_phys > 0 ? priv->num_phys : 1;
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